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Journal of Animal Science Abstract - Animal Genetics

Heritabilities and genetic correlations of fatty acid compositions in longissimus muscle lipid with carcass traits in Japanese Black cattle

 

This article in JAS

  1. Vol. 89 No. 3, p. 615-621
     
    Received: July 14, 2009
    Accepted: Oct 26, 2010
    Published: December 4, 2014


    1 Corresponding author(s): oyama@kobe-u.ac.jp
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doi:10.2527/jas.2009-2300
  1. T. Nogi*,
  2. T. Honda,
  3. F. Mukai,
  4. T. Okagaki* and
  5. K. Oyama 1
  1. Tottori Prefectural Agriculture and Forest Research Institute Livestock Research Center, Tohaku-gun, Tottori 689-2503, Japan;
    Food Resources Education and Research Center, Graduate School of Agricultural Science, Kobe University, Kasai, Hyogo 675-2103, Japan; and
    Graduate School of Agricultural Science, Kobe University, Kobe, Hyogo 657-8501, Japan

ABSTRACT

ABSTRACT

Fatty acid composition and carcass traits of 2,275 Japanese Black steers and heifers were analyzed to estimate the heritabilities and genetic correlations using the REML procedure. Slices of LM at the 6th to 7th rib section were minced and homogenized, and total lipids were extracted for the analysis by a gas chromatograph. Oleic acid accounted for the majority (51.3%), followed by palmitic (26.4%) and stearic (10.8%) acids. Heritabilities of carcass traits were moderate to high, ranging from 0.34 to 0.61, and heritabilities of individual fatty acids varied largely from 0.00 to 0.78. Those of MUFA, SFA, and PUFA were estimated to be 0.68, 0.66, and 0.47, respectively. Predicted breeding values for MUFA in 99 sires ranged from −3.0 to 5.4%. Genetic correlations of fatty acid compositions with carcass traits were generally weak (−0.28 to 0.39). Low but positive genetic correlations were obtained between beef marbling, on which emphasis of selection has been placed, and oleic acid (0.19) or MUFA (0.23). The results indicated the possibility not only for genetic improvement in fat quality traits but also simultaneous improvements with carcass traits by appropriate selection program.

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